LM5116 Buck
nguyennhando·LM5116_Buck_KiCad
About the LM5116 Buck PCB
LM5116 Buck is an open source PCB design by nguyennhando, published on GitHub under the Custom license license. It is a 4-layer board measuring 100 × 65 mm, with 52 components from 41 distinct parts.
Other key parts include the LM5116MH/NOPB. By type, the board carries 5 test points, 4 capacitors, 2 transistors, 2 connectors, 1 IC and 1 fuse.
It belongs with the power & battery and test & measurement designs in this gallery.
From the project
A fully simulated, schematic-captured, laid-out, routed, and DRC-clean 24 V → 8 V / 3 A synchronous buck converter built around TI's LM5116 wide-VIN controller — from datasheet math to fabrication-ready Gerbers.
A fully simulated, schematic-captured, laid-out, routed, and DRC-clean 24 V → 8 V / 3 A synchronous buck converter built around TI's LM5116 wide-VIN controller — from datasheet math to fabrication-ready Gerbers.
This repository contains a complete, ready-to-fabricate hardware design for a non-isolated synchronous buck converter that steps 24 VDC down to a regulated 8 VDC at up to 3 A (24 W). The design starts from TI datasheet SNVS499I as the sole engineering source, was validated in SPICE simulation, then carried through a full KiCad 10 schematic capture, 4-layer PCB layout, and design-rule…
Main components on the LM5116 Buck
LM5116 Buck bill of materials (BOM)
52 components, 41 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | LM5116MH/NOPB Texas Instruments | HTSSOP-20-1EP_4.4x6.5mm_P0.65mm_EP3.4x6.5mm_ThermalVias | U1 |
| 2 | SI7850DP-T1-E3 Vishay Siliconix | PowerPAK_SO-8_Single | Q1, Q2 |
| 1 | CONN_IN_24V Phoenix Contact | TerminalBlock_Phoenix_MKDS-1,5-2-5.08_1x02_P5.08mm_Horizontal | J1 |
| 1 | CONN_OUT_8V Phoenix Contact | TerminalBlock_Phoenix_MKDS-1,5-2-5.08_1x02_P5.08mm_Horizontal | J2 |
| 3 | GRM32ER61C107ME20L 100uF Murata | C_1210_3225Metric | CO1, CO2, CO3 |
| 1 | 100uF/50V polymer | CP_Elec_10x10.5 | C_BULK1 |
| 1 | 3300pF | C_0603_1608Metric | C_COMP1 |
| 1 | 47pF NP0 (DNP) | C_0603_1608Metric | C_FF1 |
| 2 | 100pF | C_0603_1608Metric | C_FT1, C_HF1 |
| 2 | 1uF | C_0805_2012Metric | C_HB1, C_VCC1 |
| 1 | 470pF | C_0603_1608Metric | C_RAMP1 |
| 1 | 1nF/100V (DNP) | C_1206_3216Metric | C_SNUB1 |
| 1 | 10nF | C_0603_1608Metric | C_SS1 |
| 1 | BZT52C12 | D_SOD-123 | D_RP1 |
| 1 | SMAJ28A | D_SMA | D_TVS1 |
| 1 | MF-R160 MF-R160_1.6A Bourns | RV_Disc_D9mm_W4.2mm_P5mm | F1 |
| 1 | SQ3427CEV | TSOP-6_SQ3427CEV_G1S2D3 | Q_RP1 |
| 1 | WSL2512R0150FEA 15mOhm 1W 2512 Vishay | R_2512_6332Metric | RS1 |
| 1 | 23.2k | R_0603_1608Metric | R_COMP1 |
| 2 | 10k | R_0603_1608Metric | R_DEMB1, R_RP1 |
Show 21 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | 1.21k | R_0603_1608Metric | R_FB1 |
| 1 | 6.81k | R_0603_1608Metric | R_FB2 |
| 2 | 10k (DNP) | R_0603_1608Metric | R_GS1, R_GS2 |
| 2 | 2.2 | R_0603_1608Metric | R_HOG1, R_LOG1 |
| 1 | 3.3k | R_0603_1608Metric | R_LED1 |
| 1 | 267 1W (DNP) | R_2512_6332Metric | R_PRELOAD1 |
| 1 | 4.22Meg | R_0603_1608Metric | R_RAMP1 |
| 1 | 10 (DNP) | R_1206_3216Metric | R_SNUB1 |
| 1 | 12.4k | R_0603_1608Metric | R_T1 |
| 1 | 7.15k | R_0603_1608Metric | R_UV1 |
| 1 | 102k | R_0603_1608Metric | R_UV2 |
| 1 | 5015 TP_VIN Keystone | TestPoint_Keystone_5015_Micro_Mini | TP1 |
| 1 | 5015 TP_VOUT Keystone | TestPoint_Keystone_5015_Micro_Mini | TP2 |
| 1 | 5014 TP_SW Keystone | TestPoint_Keystone_5010-5014_Multipurpose | TP3 |
| 1 | 5011 TP_AGND Keystone | TestPoint_Keystone_5010-5014_Multipurpose | TP4 |
| 1 | 5011 TP_PGND Keystone | TestPoint_Keystone_5010-5014_Multipurpose | TP5 |
| 1 | LTST-C170GKT Green Lite-On | LED_0603_1608Metric | LED1 |
| 1 | CMPD2003-7-F CMPD2003 Diodes Inc / Vishay | D_SOD-323 | D1 |
| 1 | XAL1510-223MED 22uH XAL1510-223MED Coilcraft | L_Coilcraft_XAL1510-223 | L1 |
| 4 | C3225X7R1H225K230AB 2.2uF TDK | C_1210_3225Metric | C1, C2, C3, C4 |
| 1 | CRCW06031M00FKEA 1Meg Vishay/Dale | R_0603_1608Metric | R13 |
LM5116 Buck design files
The KiCad project lives in the nguyennhando/LM5116_Buck_KiCad repository on GitHub; these links point at the commit this page was built from.
- LayoutLM5116_Buck_24Vto8V_3A.kicad_pcb
- SchematicLM5116_Buck_24Vto8V_3A.kicad_sch
- BOMBOM.csv
LM5116 Buck: common questions
How big is the LM5116 Buck PCB?
The LM5116 Buck measures 100 × 65 mm, has 4 copper layers and is 1.6 mm thick.
How many components are on the LM5116 Buck?
52 components, from 41 distinct parts, with part numbers taken from the project's own BOM. The full bill of materials is listed on this page.
Where can I download the LM5116 Buck design files?
From the nguyennhando/LM5116_Buck_KiCad repository on GitHub, which has the KiCad layout, the schematic and the BOM; the links under Design files point to each one.
Can I use the LM5116 Buck design in my own project?
It is published under Custom license, which limits how it may be reused; read the license before building on it.
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